What is CVE-2025-50735?

CVE-2025-50735 is a high-severity vulnerability in Nextchat, classified under Path Traversal. CVSS score: 7.5/10. Published 2025-11-03.

How severe is CVE-2025-50735?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Nextchat

CVE-2025-50735

Directory traversal vulnerability in NextChat thru 2.16.0 due to the WebDAV proxy failing to canonicalize or reject dot path segments in its catch-all route, allowing attackers to gain sensitive information via authenticated or anonymous WebDAV endpoints.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2025-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.9th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Nextchat

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/ChatGPTNextWeb/NextChat/blob/main/app/api/webdav/[...path]/route.ts (Product)
github.com/ChatGPTNextWeb/NextChat/blob/main/app/utils/cloud/webdav.ts (Product)
github.com/fai1424/Vulnerability-Research/tree/main/CVE-2025-50735 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-50735?: CVE-2025-50735 is a high-severity vulnerability in Nextchat, classified under Path Traversal. CVSS score: 7.5/10. Published 2025-11-03.
How severe is CVE-2025-50735?: High severity. CVSS v3 base score is 7.5 out of 10.